provides handling of requestChannel with complete flag

Signed-off-by: Oleh Dokuka <[email protected]>

Author: OlegDokuka

Diff for: rsocket-core/src/main/java/io/rsocket/core/RSocketResponder.java

@@ -221,7 +221,11 @@ private void handleFrame(ByteBuf frame) {
           break;
         case REQUEST_CHANNEL:
           long channelInitialRequestN = RequestChannelFrameCodec.initialRequestN(frame);
-          handleChannel(streamId, frame, channelInitialRequestN);
+          handleChannel(streamId, frame, channelInitialRequestN, false);
+          break;
+        case REQUEST_CHANNEL_COMPLETE:
+          long completeChannelInitialRequestN = RequestChannelFrameCodec.initialRequestN(frame);
+          handleChannel(streamId, frame, completeChannelInitialRequestN, true);
           break;
         case METADATA_PUSH:
           handleMetadataPush(metadataPush(super.getPayloadDecoder().apply(frame)));
@@ -345,7 +349,7 @@ private void handleStream(int streamId, ByteBuf frame, long initialRequestN) {
     }
   }
 
-  private void handleChannel(int streamId, ByteBuf frame, long initialRequestN) {
+  private void handleChannel(int streamId, ByteBuf frame, long initialRequestN, boolean complete) {
     if (FrameHeaderCodec.hasFollows(frame)) {
       RequestChannelResponderSubscriber subscriber =
           new RequestChannelResponderSubscriber(streamId, initialRequestN, frame, this, this);
@@ -358,6 +362,9 @@ private void handleChannel(int streamId, ByteBuf frame, long initialRequestN) {
 
       if (this.add(streamId, subscriber)) {
         this.requestChannel(firstPayload, subscriber).subscribe(subscriber);
+        if (complete) {
+          subscriber.handleComplete();
+        }
       }
     }
   }

Diff for: rsocket-core/src/main/java/io/rsocket/frame/FrameType.java

@@ -195,6 +195,17 @@ public enum FrameType {
   /** A {@link #PAYLOAD} frame with {@code NEXT} and {@code COMPLETE} flags set. */
   NEXT_COMPLETE(0xC0, Flags.CAN_HAVE_DATA | Flags.CAN_HAVE_METADATA | Flags.IS_FRAGMENTABLE),
 
+  // SYNTHETIC REQUEST_CHANNEL WITH COMPLETION
+
+  /** A {@link #REQUEST_CHANNEL} and {@code COMPLETE} flags set. */
+  REQUEST_CHANNEL_COMPLETE(
+      0xD7,
+      Flags.CAN_HAVE_METADATA
+          | Flags.CAN_HAVE_DATA
+          | Flags.HAS_INITIAL_REQUEST_N
+          | Flags.IS_FRAGMENTABLE
+          | Flags.IS_REQUEST_TYPE),
+
   /**
    * Used To Extend more frame types as well as extensions.
    *